Adhesive material

Abstract

To provide a new sticking material in which a fluorine-free water repellent agent is used and water repellency and overlapping sticking property (self-back surface adhesive force) are made compatible.SOLUTION: A patch material comprising a support made of a woven fabric treated with a treatment liquid containing a non-fluorine water repellent agent, and an adhesive layer formed on at least one surface of the support and covering the entire surface, wherein the treatment liquid contains 2.0 to 5.5% by mass of a hydrocarbon-based non-fluorine water repellent agent and contains an isocyanate-based crosslinking agent.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a water-repellent adhesive patch having good adhesive properties on its back surface, and more particularly to a water-repellent adhesive patch used for taping tape applications. [Background technology]

[0002] Taping tape is known as a medical or sports adhesive material designed to fix soft biological tissues such as joints, muscles, ligaments, or tendons. Taping tapes are often made with cotton threads, taking into consideration their ability to fixate arms and legs, ease of tearing, and breathability. However, once cotton threads become wet with water from the outside, they tend to dry slowly, causing discomfort and becoming heavy due to moisture absorption, which can impair the user's experience. Therefore, techniques for imparting water repellency to substrates have been proposed. For example, Patent Document 1 proposes an adhesive material comprising a support treated with a fluorine-based resin-based water repellent and an adhesive layer. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-248182 Summary of the Invention [Problem to be solved by the invention]

[0004] Conventionally, as shown in Patent Document 1 and the like, fluorine-based water repellents have been widely used when imparting water repellency to a substrate because excellent performance can be obtained with a small amount. However, in recent years, restrictions have been imposed on the use of perfluorohexanoic acid (PFHxA) and its salts, as well as PFHxA-related substances, which are contained in fluorine-based water repellents. This has led to a demand for the development of substrates that use non-fluorine-based water repellents that do not contain these substances, as well as patches and tapes that use such substrates. However, it is known that adhesive patches with a substrate treated with a non-fluorine-based water repellent agent have difficulty achieving both water repellency and overlapping properties (self-backing adhesive strength) compared to adhesive patches with a substrate treated with a fluorine-based water repellent agent. In other words, there is a trade-off between increasing water repellency and decreasing overlapping properties, and improving overlapping properties results in poor water repellency. Therefore, achieving both water repellency and overlapping properties has become a challenge in the transition to non-fluorine-based water repellents in adhesive patches.

[0005] An object of the present invention is to provide a new adhesive material that uses a non-fluorinated water repellent agent and that combines water repellency with overlapping properties (adhesive strength on the back side). [Means for solving the problem]

[0006] The present inventors have discovered that by employing a hydrocarbon-based water repellent as the non-fluorinated water repellent and combining this with an isocyanate-based crosslinking agent, and by adjusting the hydrocarbon-based water repellent to a specific concentration in the treatment liquid used for the water-repellent treatment of the substrate and also adjusting the isocyanate-based crosslinking agent to a specific concentration, an adhesive material can be obtained that has excellent water repellency and satisfactory overlapping properties (self-backside adhesive strength), and that an adhesive material that is particularly useful as a taping tape can be provided.

[0007] That is, the present invention is directed to the following patches. [1] A patch comprising: a support made of a woven fabric treated with a treatment liquid containing a non-fluorine-containing water repellent; and a pressure-sensitive adhesive layer formed on at least one surface of the support and covering the entire surface of said surface, The adhesive material, wherein the treatment liquid contains 2.0 to 5.5% by mass of a hydrocarbon-based non-fluorine-containing water repellent agent and an isocyanate-based crosslinking agent.

[0008] Furthermore, the present invention provides the following embodiments. [2] The adhesive material according to [1], wherein the treatment liquid contains the isocyanate-based crosslinking agent in an amount of 0.5 to 1.0% by mass. [3] The adhesive material according to [1], which has a water repellency level of 3 or higher according to the spray method. [4] The adhesive material according to [1], having an adhesive strength on its back side of 2.4 N / 25 mm or more. [5] The adhesive material according to [1], wherein the pressure-sensitive adhesive layer contains an acrylic pressure-sensitive adhesive. [6] The adhesive material according to [1], which is in a roll shape and is used as a taping tape. [Effects of the Invention]

[0009] The adhesive material of the present invention exhibits high water repellency, has high adhesive strength on its back side, and is excellent in overlapping properties, and therefore can provide an adhesive material that is particularly suitable for use as a taping tape, etc. DETAILED DESCRIPTION OF THE INVENTION

[0010] Conventionally, water repellents, whether fluorine-based or non-fluorine-based, have mostly been used alone without combining them with crosslinking agents, etc., and can be said to function satisfactorily for applications such as clothing. However, as mentioned above, when using non-fluorine-based water repellents alone in adhesive materials such as taping tapes with the aim of eliminating fluorination, one faces the problem of reduced overlapping properties (self-backing adhesive strength) when trying to maintain high water repellency. This time, by adding a crosslinking agent together with a non-fluorine-based water repellent agent to the substrate treatment liquid, and by setting the concentrations of the water repellent agent and crosslinking agent within specific ranges, we have discovered a taping tape that simultaneously achieves high water repellency and excellent overlapping properties. The present invention will be described in detail below.

[0011] [Adhesive material] The adhesive patch of the present invention is directed to an adhesive patch comprising a backing made of a woven fabric treated with a treatment liquid containing a hydrocarbon-based non-fluorinated water repellent, and an adhesive layer formed on at least one surface of the backing and covering the entire surface of said surface, and is characterized in that the treatment liquid contains 2.0 to 5.5 mass% of the non-fluorinated water repellent, and also contains an isocyanate-based crosslinking agent. The adhesive material having the above-mentioned structure has excellent overlapping adhesion as indicated by the adhesive strength on its back surface, and can also be highly evaluated for water repellency as measured by the spray method.

[0012] [Self-back adhesive strength] In the adhesive patch of the present invention, the adhesive strength on the back surface is preferably 2.4 N / 25 mm or more, more preferably 2.5 N / 25 mm or more, and can be 3.0 N / mm or more. If the adhesive strength on the back surface is less than 2.4 N / 25 mm, there is a high possibility that the overlapped portions of the adhesive patch will peel off spontaneously during normal use in daily life. In the present invention, the adhesive strength of the back surface refers to the peel strength when the adhesive layer of the adhesive material is attached to the surface of the support material of the adhesive material and then peeled off in a 180° direction in accordance with the test method for adhesive tapes specified in JIS Z0237. The adhesive patch of the present invention has the above-mentioned predetermined adhesive strength on its back surface, and therefore can provide an adhesive patch that achieves good adhesion without peeling off at the overlapped portions.

[0013] As an example of a specific test procedure for measuring backside adhesive strength, the target adhesive material is cut into two pieces measuring 100 mm long and 25 mm wide to form test pieces. One test piece (referred to as test piece 1) is attached to a Bakelite plate, and another test piece (referred to as test piece 2) is attached to the support surface of test piece 1, approximately at the center, leaving the longitudinal edge unattached. A 2 kg roller is then rolled back and forth twice at 300 mm / min over the support surface of test piece 2 in an atmosphere of 23°C and 50% RH, pressing test piece 2 onto test piece 1. After leaving the material in this state for 20 minutes, a 180° peel test is performed in the longitudinal direction at a speed of 300±30 mm / min using an Instron tensile tester, and the 180° peel force (N) is measured (unit: N / 25 mm). The test is performed three times, and the average peel force is calculated to determine the backside adhesive strength (unit: N / 25 mm) of the adhesive material. There is no particular upper limit to the adhesive strength on the back surface of the adhesive material of the present invention, but if it is too high, it will be difficult to remove the adhesive material when replacing it, so it can be set to, for example, 10.0 N / 25 mm or less, 8.0 N / 25 mm or less, or 6.0 N / 25 mm or less.

[0014] [Water repellency (spray method)] The adhesive material of the present invention preferably has a water repellency measured by a spray method (hereinafter sometimes referred to as "water repellency (spray method)") of grade 3 or higher. Water repellency by the spray method is measured and evaluated in accordance with the water repellency test (spray test) specified in JIS L1092. Specifically, the adhesive material is cut into 20 cm x 20 cm pieces to prepare test pieces, and a spray test is performed from the support side (after peeling off the release paper, if any) to measure the water repellency (spray method) of the test piece. If a 20 cm x 20 cm test piece cannot be obtained, five test pieces measuring 20 cm long x 5 cm wide can be taken and applied with an overlap of about 1 cm in the width direction (shorter width) to form a test piece approximately 20 cm long x 20 cm wide, and the water repellency (spray method) can be evaluated for areas other than the overlapped areas. Water repellency (spray method) is evaluated on a scale of 1 to 5 (see below) by comparing it with a wet comparison sample (photo). The higher the grade, the higher the water repellency. The test is carried out three times, the average value of the class is calculated, and the value rounded up to the nearest whole number is used as the water repellency (spray method) (class) of the adhesive material. Evaluation Criteria Grade 5: No moisture or water droplets on the surface. Grade 4: The surface does not get wet, but small water droplets are present. Grade 3: Small individual droplets of water are present on the surface. Grade 2: Half of the surface is wetted, with small individual wetting spots penetrating the fabric. Grade 1: Wetting is observed over the entire surface.

[0015] <Support> The patch of the present invention uses a support made of a woven fabric treated with a treatment liquid containing a non-fluorine-containing water repellent.

[0016] <Woven fabric> The material (fiber) constituting the woven fabric is not particularly limited, and examples thereof include cellulose fibers such as cotton and rayon; synthetic fibers such as polyester, polyamide, acrylic, polyurethane, polyethylene, and polypropylene; and these materials can be used alone or in combination. Furthermore, elastic fibers, non-elastic fibers, or combinations of these can be used.

[0017] As an example, from the viewpoint of flexibility, stretchability, self-back adhesiveness, etc., it is preferable to use a woven fabric in which a composite yarn of cellulosic fiber and elastic fiber is arranged in some or all of the warp threads, or a woven fabric in which one S-twisted strong twisted yarn and one Z-twisted strong twisted yarn of cellulosic fiber are arranged in the warp threads alternately. Examples of the cellulosic fibers include cotton, viscose rayon, and polynosic fibers. The composite yarn of cellulose fiber and elastic fiber refers to a twisted yarn, covered yarn, core spun yarn, etc., of the cellulose fiber and an elastic fiber (e.g., polyether polyurethane fiber, polyester polyurethane fiber, synthetic rubber fiber). Among these composite yarns, a core spun yarn of cellulose fiber and polyether polyurethane fiber (a yarn in which cotton yarn is wrapped around polyurethane fiber, also known as "CSY (core spun yarn)") is preferred, but is not limited to this. The blend ratio of cellulose fiber and elastic fiber in the composite yarn can be, for example, 85 to 98 mass% of cellulose fiber, or 90 to 96 mass%. The weft of the woven fabric may be made of any fiber, such as so-called synthetic fibers, such as polyester fibers, polyamide fibers, and acrylic fibers; or cellulosic fibers, such as cotton and rayon.

[0018] For example, in the case of a woven fabric using core spun yarns for the warp, the warp yarns may be 8 to 60 count core spun yarns arranged at a density of 16 to 48 threads per inch, and the weft yarns may be 6 to 30 count cotton yarns arranged at a density of 40 to 80 threads per inch. For use as a taping tape, it is preferable that the woven fabric be one-way stretchable rather than two-way stretchable in order to improve the immobilization of the arms and legs.

[0019] The woven fabric used can be one that stops stretching when stretched by hand in the longitudinal direction at 50 to 150% elongation, or one that stops stretching when stretched by 60 to 120%. "Strain limit" refers to a state in which, when the patch is strongly pulled by hand in the longitudinal direction, the patch reaches its stretch limit and cannot be stretched any further. The longitudinal length of the patch before stretching is defined as 100%, and this refers to the ratio (%) of the stretched length of the patch when it reaches its stretch limit to that length (before stretching). For example, a "strain limit" of 100% means that the patch has been stretched to twice the length of the patch before stretching, reaching its limit.

[0020] Furthermore, in order for a patch having a support made of a woven fabric treated with a treatment solution containing a non-fluorine-containing water repellent to have high water repellency, it is preferable that no openings formed between the threads are visible when the woven fabric (untreated) is held through light. However, it is also preferable that the area of ​​the openings is 0.3 mm 2 An opening of this size or smaller is considered to have no effect on water repellency, and therefore such a small opening may be acceptable.

[0021] The thickness of the woven fabric is not particularly limited, but from the viewpoint of flexibility and stretchability, it can be, for example, in the range of 100 μm to 10 mm, or 500 μm to 7 mm, or 1 to 5 mm. In particular, for adhesive materials for taping tapes, woven fabrics with a thickness in the range of 2 to 4 mm can be used. The thickness of the woven fabric can be adjusted by the thickness of the threads and the number of threads per thread.

[0022] The edges of the woven fabric may be treated to prevent fraying of the threads, or may be made thinner than the center of the fabric by applying heat or pressure, or may be subjected to processing such as lock stitching.

[0023] <Treatment of woven fabric with treatment liquid containing non-fluorine water repellent> The backing used in the patch of the present invention is a woven fabric that contains a non-fluorine-containing water repellent agent and has been subjected to a water repellent treatment with a treatment liquid containing an isocyanate-based crosslinking agent, which will be described later.

[0024] As the non-fluorine-containing water repellent, a hydrocarbon-based water repellent is used in the present invention. Specifically, aliphatic hydrocarbons, aliphatic carboxylic acids, polyolefins, polyacrylic esters, or Water-repellent hydrocarbon group-containing compounds such as polymethacrylates can be used. Examples of the aliphatic hydrocarbons include paraffinic hydrocarbons and olefinic hydrocarbons, and examples of the aliphatic hydrocarbons include those having 12 or more carbon atoms. The aliphatic carboxylic acid may be either saturated or unsaturated, and examples thereof include aliphatic carboxylic acids having 12 or more carbon atoms, and may also be esterified products of aliphatic carboxylic acids. Examples of the polyolefin include polyethylene, polypropylene, and ethylene-propylene copolymers. The polyacrylic acid ester and polymethacrylic acid ester preferably have a hydrocarbon group having 12 to 24 carbon atoms connected via an ester bond. The hydrocarbon group may be linear or branched, may be a saturated or unsaturated hydrocarbon, and may have an alicyclic or aromatic ring. Of these, linear groups are preferred, and linear alkyl groups are more preferred. The acrylic acid ester or methacrylic acid ester monomer in such a polymer may account for 80 to 100% by mass of the total amount of monomer units constituting the polymer.

[0025] The hydrocarbon-based non-fluorinated water repellent can be a commercially available product, and examples thereof include, but are not limited to, Mayshield (registered trademark) Z-1, Z-71, P-350K, and P-700 manufactured by Meisei Chemical Industry Co., Ltd.; Neoseed (registered trademark) NR-90, NR-158, NR-7080, NR-7200, and TH-44 manufactured by Nicca Chemical Co., Ltd.; and Unidyne (registered trademark) XF-5001, XF-5002, and XF-5005 manufactured by Daikin Corporation.

[0026] The crosslinking agent plays a role in promoting adhesion of the non-fluorine-containing water repellent agent to the surface of the woven fabric and imparting durability, and in the present invention, an isocyanate-based crosslinking agent (a compound having an isocyanate group) is used. Examples of the compound having an isocyanate group include tolylene diisocyanate, hexamethylene diisocyanate, diphenylmethane diisocyanate, hydrogenated diphenylmethane diisocyanate, triphenyl triisocyanate, xylene diisocyanate, and dicyclohexylmethane diisocyanate. Further examples of compounds having an isocyanate group include blocked isocyanate group-containing compounds obtained by reacting a compound having an isocyanate group with a blocking agent such as phenol, diethyl malonate, methyl ethyl ketoxime, sodium bisulfite, ε-caprolactam, etc. When the blocked isocyanate group-containing compound is heated, the blocking agent dissociates and the isocyanate group is regenerated. The isocyanate-based crosslinking agent may be a commercially available product, such as Meikanate (registered trademark) series manufactured by Meisei Chemical Industry Co., Ltd. or NK Assist series manufactured by Nicca Chemical Co., Ltd., but is not limited to these.

[0027] The treatment liquid used for the water-repellent treatment of the woven fabric can be in the form of an aqueous solution obtained by diluting the non-fluorinated water repellent agent (hydrocarbon-based water repellent agent) and the crosslinking agent (isocyanate compound) with a solvent such as water or a water-alcohol, preferably with water (purified water, industrial water, etc.). In the treatment liquid, the concentration of the non-fluorinated water repellent agent (solid content) is 2.0 to 5.5 mass %, and in this case, the concentration of the crosslinking agent (solid content) can be 0.5 to 1.5 mass %.

[0028] As mentioned above, it is difficult to balance the improvement of water repellency and the maintenance of overlapping properties in a patch, and it is difficult to achieve this with a water repellent agent alone. However, the inventors have discovered that by blending a crosslinking agent, However, if the treatment concentration of the water repellent agent is too high, the adhesive strength of the back surface will decrease even if a crosslinking agent is added, and if the treatment concentration of the water repellent agent is too low, the adhesive strength of the back surface will be maintained but the water repellency will be insufficient. Therefore, as mentioned above, it is important to set the concentration of the water repellent agent in the treatment solution to 2.0 to 5.5% by mass. However, since excessive use of the crosslinking agent may impair the texture, it is desirable to set the upper limit to about 1.5% by mass.

[0029] The water repellent treatment of a woven fabric may be carried out by treating the knitted fabric with the treatment liquid containing the hydrocarbon-based non-fluorinated water repellent and the isocyanate-based crosslinking agent by a pad nip method, a spray method, a coating method, a kiss roll method, etc. For example, when the treatment is carried out by the pad nip method, specifically, the woven fabric is immersed in the treatment liquid at a temperature of 4 to 30°C, for example, 5 to 25°C, or for example, at room temperature, for an appropriate period of time, and then the excess liquid is squeezed out to remove it, and the woven fabric is dried at a temperature of 130°C or higher, preferably 130°C to 200°C, to obtain a support made of a woven fabric treated with a hydrocarbon-based water repellent.

[0030] <Other processing, etc.> The backing of the patch of the present invention may contain, as needed, commonly used additives such as ultraviolet absorbers, antibacterial agents, antioxidants, fillers, pigments, fragrances, colorants, flame retardants, antistatic agents (anionic surfactants, cationic surfactants, nonionic surfactants), etc. These additives may be blended into the fibers that form the woven fabric, or may be added to a treatment solution when the woven fabric is surface-treated, or may be applied to the woven fabric, and are used in normal amounts depending on the type of additive, as long as they do not impair the breathability of the patch. The backing of the patch of the present invention may be impregnated with a synthetic resin that has affinity and adhesiveness for the woven fabric, such as an acrylic resin.

[0031] <Adhesive layer> The adhesive layer formed on at least one surface of the support can be formed using adhesives such as (natural / synthetic) rubber-based adhesives, acrylic-based adhesives, urethane-based adhesives, silicone-based adhesives, polyvinyl alcohol-based adhesives, polyamide-based adhesives, etc. These adhesives may be used alone or in combination of two or more. Among these, acrylic adhesives (adhesives containing acrylic resins) can be used from the viewpoints of having sufficient adhesiveness to the skin surface, being less irritating to the skin, and having high moisture permeability.

[0032] Examples of the acrylic pressure-sensitive adhesive include homopolymers of alkyl ester monomers of (meth)acrylic acid having about 4 to 12 carbon atoms, such as butyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, and isononyl (meth)acrylate, or copolymers of these monomers, as well as pressure-sensitive adhesives containing copolymers of the alkyl (meth)acrylate monomers with other monomers copolymerizable with the alkyl (meth)acrylate monomers, such as (meth)acrylic acid, hydroxyalkyl esters of (meth)acrylic acid, vinyl acetate, styrene, vinylpyrrolidone, (meth)acrylamide, and alkoxyalkyl (meth)acrylates. In the acrylic pressure-sensitive adhesives, the alkyl (meth)acrylate monomer can be used in a proportion of typically 50% by mass or more, for example 60% by mass or more, or for example 65 to 99% by mass, or 70 to 99% by mass. The other monomer copolymerizable with the (meth)acrylic acid alkyl ester monomer can be used in a proportion of usually 50% by mass or less, for example 40% by mass or less, or for example 35 to 1% by mass, or 30 to 1% by mass. In the present invention, (meth)acrylate refers to both acrylate and methacrylate, for example, (meth)acrylic acid refers to both acrylic acid and methacrylic acid. The acrylic adhesive is obtained by polymerizing the monomer in an organic solvent such as toluene, hexane, or ethyl acetate using a peroxide such as benzoyl peroxide as an initiator under a nitrogen atmosphere. The monomer may be a solvent-based polymer, or an emulsion-based polymer obtained by emulsifying and dispersing the monomer in water with an emulsifier and then polymerizing the resulting mixture.

[0033] Furthermore, the adhesive forming the adhesive layer may contain, in addition to the above-mentioned acrylic adhesive, a tackifying resin (tackifier) ​​such as a rosin-based resin, a terpene-based resin, or a terpene phenol-based resin, as well as additives that can be typically incorporated into adhesive layers, such as a crosslinking agent such as a polyisocyanate, a multifunctional epoxy resin, a melamine resin, a peroxide, or a metal chelate compound, a softener (plasticizer), a pH adjuster, an antioxidant (antioxidant, preservative), a filler, an ultraviolet absorber, a colorant, and a fragrance. For example, the tackifier can be added in an amount of 20 parts by mass or less, or 15 parts by mass or less, and other additives can be added in an amount of 10 parts by mass or less, or 0.01 to 5 parts by mass, relative to 100 parts by mass of the acrylic adhesive (acrylic resin).

[0034] In the adhesive patch of the present invention, the adhesive layer is adjacent to the support and formed on at least one surface of the support so as to cover the entire surface of that surface. In conventional adhesive patches comprising a support and an adhesive layer, the adhesive layer may not be formed on the entire surface of the support, but may be formed in a partial pattern such as a lattice, stripes, or dots, if necessary or desired. However, in the adhesive patch of the present invention, when the adhesive layer is adjacent to the support and formed on at least one surface of the support so as not to cover the entire surface of that surface, water may infiltrate or penetrate from the area not covered by the adhesive layer, which may reduce the waterproofness of the adhesive patch. The pressure-sensitive adhesive layer may be configured to consist of a single pressure-sensitive adhesive layer, or may be configured to have a plurality of pressure-sensitive adhesive layers laminated together. When the pressure-sensitive adhesive layer is configured to have a plurality of pressure-sensitive adhesive layers laminated together, different types of pressure-sensitive adhesive layers may be laminated together. The thickness of the pressure-sensitive adhesive layer can usually be set to 10 μm to 200 μm, for example, 20 μm to 100 μm.

[0035] The pressure-sensitive adhesive layer can also be provided on both sides of the support as needed. When pressure-sensitive adhesive layers are provided on both sides of the support, the pressure-sensitive adhesive layer provided on the side of the support that does not come into contact with the skin may be formed thinner than the pressure-sensitive adhesive layer provided on the side that usually comes into contact with the skin, and may be formed over the entire surface of the support, or may be formed partially (patterned) in a lattice, stripe, dotted, or other pattern. By providing the pressure-sensitive adhesive layer on the side that does not come into contact with the skin in the center or edge of the support, the adhesiveness of the back surface itself can be improved.

[0036] <Removal material> The release material is provided for the purpose of protecting the adhesive layer until immediately before the patch is used, and embodiments in which such a release material is provided can also be included in the patch of the present invention. The release material can be any of those commonly used in the technical fields of adhesive tapes and patches (adhesive materials). For example, paper substrates such as fine paper and glassine paper, plastic films (resin films) such as polyester (polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyethylene naphthalate, etc.), release-processed paper or release-processed film obtained by coating these paper substrates or resin films with a release agent having release properties such as silicone resin or fluororesin, laminated paper obtained by laminating these films, and laminated release-processed paper obtained by coating the laminated paper with a release agent, etc., can be used. The thickness of the release liner is not particularly limited, but is usually in the range of 10 μm to 1 mm, for example, 20 μm to 500 μm, and preferably 40 μm to 200 μm. 2 or 60-100g / m 2 It can be about. The amount of release agent applied during the release treatment is usually 0.1 to 10 g / m 2 The release treatment (mold release treatment) of the release material is not only performed on the surface that comes into contact with the adhesive layer, but also on the adhesive surface. The release material may also be provided on the surface opposite to the agent layer. In addition, one or both surfaces of the release material may be provided with an uneven shape to make it easier to remove the patch from the packaging material. The shape of the release material can be selected appropriately to match the shape of the patch, and its size can be the same as or slightly larger than the size of the support in the patch, and the corners can be rounded if desired. The release material may be composed of a single sheet or multiple divided sheets, and the cuts may be straight, wavy, or perforated, and the release materials may partially overlap each other.

[0037] <Method of manufacturing adhesive patches> The adhesive patch of the present invention can be manufactured by following the manufacturing method of conventional adhesive patches (adhesive patches). For example, an adhesive layer is first formed by coating one surface of the support with an adhesive, and if necessary, a release material is further laminated on the adhesive layer to form the adhesive patch. Specifically, for example, a pressure-sensitive adhesive layer can be formed by applying a solution or emulsion of an adhesive to a processing paper coated with a silicone-based release agent or the like, and then laminating the adhesive layer and a support to produce a patch in the form of a pressure-sensitive adhesive tape. The processing paper is a general term for paper or film used during the manufacturing process that does not remain in the product, and the films and papers exemplified above under "release material" can be used here. When the patch of the present invention further comprises a release material, a release material may be further laminated on the pressure-sensitive adhesive layer, or the release-treated processing paper may itself be used as the release material.

[0038] As described above, the adhesive patch of the present invention may further comprise a release material if necessary and may be provided as a sheet-shaped adhesive patch, or may be wound up into a roll and provided as a roll-shaped adhesive patch. The roll-shaped adhesive material may be in the form of an adhesive material with a release material wound into a roll, but because the adhesive material of the present invention has excellent adhesive strength on its back surface, it can also be in the form of a roll-shaped adhesive material without a release material by sequentially winding adhesive materials without a release material onto the back surface of the adhesive material to form a roll. When a release material is provided, the release material may be divided into two or more pieces to make it easier to peel off, or may have multiple slits in the width direction.

[0039] <Taping tape> The adhesive material of the present invention, particularly the roll-shaped adhesive material, has excellent adhesive strength to its back surface and water repellency, and can therefore be suitably used as a taping tape. Therefore, an adhesive material in a roll shape that is used as a taping tape, i.e., a taping tape formed from the adhesive material of the present invention, is also within the scope of the present invention. The taping tape of the present invention can be used in the fields of sports taping for the purposes of injury prevention, first aid, and recurrence prevention, as well as medical or daily taping for preventing or relieving various pains such as lower back pain, sudden lower back pain, joint pain due to injury, pain from hallux valgus, etc. The taping tape of the present invention can also be used as an auxiliary means for rehabilitation, supporting the injured area during the functional recovery phase and relieving pain. [Example]

[0040] EXAMPLES The present invention will be specifically explained below with reference to examples and comparative examples, but the present invention is not limited to these examples.

[0041] [Example 1] The woven fabric used to form the support is made of 16-count core spun yarn with a polyurethane fiber core at a density of 30 threads per inch for the warp, and 14-count 100% cotton yarn at 49 threads per inch for the weft. A woven fabric (hereinafter referred to as "woven fabric a") arranged at a density of threads / inch was used. A support treatment liquid was prepared by diluting Meisei Chemical Industry Co., Ltd.'s Meishield (registered trademark) Z-71, a hydrocarbon-based water repellent, to a concentration of 2.00 mass %, and Meisei Chemical Industry Co., Ltd.'s Meikanate (registered trademark) CX, an isocyanate-based crosslinking agent, to a concentration of 1.0 mass %, both in industrial water. After immersing the woven fabric a in the treatment liquid at room temperature, excess liquid was squeezed out and the fabric was dried at a maximum temperature of 180°C for 3 to 4 minutes to obtain a support a made of a woven fabric treated with a hydrocarbon-based water repellent.

[0042] The adhesive (1) shown in Table 2, which was coated on a process paper, was applied to one side of the support a in an amount of 38 g / m after drying. 2 The adhesive layer was formed by transfer coating so that the adhesive layer had the following properties, and the adhesive material of Example 1 was obtained.

[0043] [Examples 2 to 4, Comparative Example 4] The adhesive materials of Examples 2 to 4 and Comparative Example 4 were obtained in the same manner as in Example 1, except that in the treatment solution for woven fabric a, the concentrations of the hydrocarbon water repellent agent and the isocyanate crosslinking agent were changed to the concentrations shown in Table 3.

[0044] [Examples 5 to 6, Comparative Examples 1 to 3] Instead of woven fabric a, a woven fabric (hereinafter referred to as "woven fabric b") was used to form the support, with the warp threads being 20-count core spun yarns with a polyurethane fiber core arranged at a density of 32 threads / inch, and the weft threads being 16-count 100% cotton yarns arranged at a density of 60 threads / inch. In addition, instead of adhesive (1), adhesive (2) shown in Table 2 was used, and the concentration of the hydrocarbon-based water repellent and the isocyanate-based crosslinking agent were changed to the concentrations shown in Table 3. The coating amount after drying was 48 g / m 2 The adhesive patches of Examples 5 and 6 and Comparative Examples 1 to 3 were obtained in the same manner as in Example 1, except that the above conditions were met.

[0045] [Table 1] [Table 2]

[0046] The patches of Examples 1 to 6 and Comparative Examples 1 to 4 were subjected to various evaluation tests according to the following procedures. The results are shown in Table 3.

[0047] [Self-back adhesive strength] The adhesive strength of the adhesive patch on its back surface was measured according to the 180° peeling method specified in JIS Z 0237. Specifically, two test pieces were cut into strips measuring 100 mm in the length direction and 25 mm in the width direction from the adhesive material sample of each example produced, and designated as test pieces 1 and 2. Test piece 1 was attached to a Bakelite board (phenolic resin board, manufactured by Sumitomo Bakelite Co., Ltd., PL-1102), and then the other test piece 2 was attached and overlapped approximately on top of the center of test piece 1, leaving the edge of test piece 2 unattached. Next, a 2 kg rubber roll was pressed against test piece 2, leaving the edge, and then reciprocated once at a speed of 300 mm / min. After 20 minutes had passed, the pressed sample (a sample having a laminated structure of Bakelite plate-test piece 1-test piece 2) was peeled from test piece 1 using an Instron tensile tester at a peel angle of 180° and a peel speed of 300 mm / min, and the 180° peel strength (self-backside adhesive strength, unit: N / 25 mm) of test piece 2 against test piece 1 was measured (average value of N=3). The measurement atmosphere was a temperature of 23±2°C and a relative humidity of 50±5%. Those having an adhesive strength on the back side of 2.40 [N / 25 mm] or more were evaluated as ◯, and those having an adhesive strength of less than 2.40 [N / 25 mm] were evaluated as x.

[0048] [Water repellency (spray method)] The water repellency of the patch was evaluated according to the water repellency test (spray test) specified in JIS L1092. Specifically, test pieces cut into 20mm x 20mm squares were placed in the holder of the testing device and sprayed with water from the support side of each test piece. The wet state of the test piece was compared with a wet comparison sample and evaluated according to the following criteria (N=3). The water repellency (spray method) was evaluated as ◯ when it was grade 3 or higher, and x when it was grade 2 or lower. Evaluation Criteria Grade 5: No moisture or water droplets on the surface. Grade 4: The surface does not get wet, but small water droplets are present. Grade 3: Small individual droplets of water are present on the surface. Grade 2: Half of the surface is wetted, with small individual wetting spots penetrating the fabric. Grade 1: Wetting is observed over the entire surface.

[0049] [Table 3]

[0050] As shown in Table 3, the adhesive materials of Examples 1 to 6, which have a support (woven fabric) treated with a treatment liquid containing 2.00 to 5.50 mass% of a hydrocarbon-based water repellent and an isocyanate-based crosslinking agent, had a backside adhesive strength of 2.40 N / 25 mm or more and a water repellency (spray) of grade 3 or higher, regardless of the type of adhesive, and were rated as good for all performances. On the other hand, the adhesive materials of Comparative Examples 1 to 3, in which the content of the water repellent agent was greater than 5% by mass, were rated as grade 4 for water repellency (spray), but had backside adhesive strength of less than 2.40 N / 25 mm.Furthermore, when the content of the water repellent agent was less than 2.00% by mass, a backside adhesive strength of more than 2.40 N / 25 mm was achieved, but the water repellency (spray) was rated as grade 1, meaning that both backside adhesive strength and water repellency were not achieved.

[0051] As shown in the results of the Examples above, it has been confirmed that the adhesive patch of the present invention, which uses a woven fabric impregnated with a treatment liquid containing a hydrocarbon-based non-fluorinated water repellent and an isocyanate-based crosslinking agent in a specific ratio, can realize an adhesive patch that exhibits high water repellency and high overlapping properties (self-backside adhesive strength), and is particularly useful for taping tape applications.

Claims

1. A patch comprising: a support made of a woven fabric treated with a treatment liquid containing a non-fluorine-containing water repellent; and a pressure-sensitive adhesive layer formed on at least one surface of the support and covering the entire surface of said surface, The adhesive material comprises a treatment liquid containing 2.0 to 5.5% by mass of a hydrocarbon-based non-fluorine-containing water repellent agent and an isocyanate-based crosslinking agent.

2. The adhesive material according to claim 1, wherein the treatment liquid contains the isocyanate-based crosslinking agent in an amount of 0.5 to 1.0% by mass.

3. 2. The adhesive material according to claim 1, wherein the water repellency measured by a spray method is grade 3 or higher.

4. 2. The adhesive material according to claim 1, wherein the adhesive strength of the back surface is 2.4 N / 25 mm or more.

5. The adhesive material according to claim 1 , wherein the adhesive layer comprises an acrylic adhesive.

6. The adhesive material according to claim 1, which is in the form of a roll and is used as a taping tape.

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